I had been in discussions with a customer about getting OPC data from a Hamilton probe control box into our PI archive. I was assured it had an OPC server. I just received a demo model of the control box. The OPC server is OPC XLM-DA. It seems like at first glance I'm SOL.
It does output Modbus and I have a Modbus to Ethernet converter I had used on another device but that is a big hassel.